Simple History shows recent changes made within WordPress, directly on your dashboard or on a separate page.

The plugin works as a log/history/audit log/version history of the most important events that occur in WordPress.

Out of the box Simple History has support for:

Posts and pages
see who added, updated or deleted a post or page

Attachments
see who added, updated or deleted an attachment

Taxonomies (Custom taxonomies, categories, tags)
see who added, updated or deleted an taxonomy

Comments
see who edited, approved or removed a comment

Widgets
get info when someone adds, updates or removes a widget in a sidebar

Plugins
activation and deactivation

User profiles
info about added, updated or removed users

User logins
see when a user login & logout. Also see when a user fails to login (good way to catch brute-force login attempts).

Failed user logins
see when someone has tried to log in, but failed. The log will then include ip address of the possible hacker.

Menu edits

Option screens
view details about changes made in the differnt settings sections of WordPress. Things like changes to the site title and the permalink structure will be logged.

Support for third party plugins

By default Simple History comes with built in support for the following plugins:

User Switching
The User Switching plugin allows you to quickly swap between user accounts in WordPress at the click of a button.
Simple History will log each user switch being made.

Enable Media Replace
The Enable Media Replace plugin allows you to replace a file in your media library by uploading a new file in its place.
Simple history will log details about the file being replaced and details about the new file.

Limit Login Attempts
The plugin Limit Login Attempts is old
and has not been updated for 4 years. However it still has +1 million installs, so many users will benefit from
Simple History logging login attempts, lockouts, and configuration changes made in the plugin Limit Login Attempts.

Redirection
The redirection plugin manages url redirections, using a nice GUI.
Simple History will log redirects and groups that are created, changed, enabled or disabled and also when the global plugin settings have been modified.

RSS feed available

There is also a RSS feed of changes available, so you can keep track of the changes made via your favorite RSS reader on your phone, on your iPad, or on your computer.

It’s a plugin that is good to have on websites where several people are
involved in editing the content.